Cosmological constraints from clustering properties of galaxy clusters

Details Cosmological constraints from clustering properties of galaxy clusters Cosmological constraints from clustering properties of galaxy clusters

2005-08-27

arxiv.org/abs/astro-ph/0508592v1

Astron.Astrophys.432:771,2005

Astronomy and Astrophysics

Astrophysics

printed in A&A

Scientific paper

10.1051/0004-6361:20041535

In this paper, we discuss improvements of the Suto et al. (2000) model, in the light of recent theoretical developments (new theoretical mass functions, a more accurate mass-temperature relation and an improved bias model) to predict the clustering properties of galaxy clusters and to obtain constraints on cosmological parameters. We re-derive the two-point correlation function of clusters of galaxies for OCDM and LambdaCDM cosmological models, and we compare these results with the observed spatial correlation function for clusters in RASS1 (ROSAT All-Sky Survey 1), and in XBACs (X-RAY Brighest Abell-Type) samples. The comparison shows that the best agreement is obtained for the LambdaCDM model with Omega=0.3. The values of the correlation length obtained, (r_\simeq 28.2 \pm 5.2 \rm h^{-1}} Mpc for LambdaCDM), are larger than those found in the literature and comparable with the results found in Borgani, Plionis & Kolokotronis (1999). (REST IN THE PAPER ABSTRACT)

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